The following study examined the incidence of certain behaviors in separate dogs from the litter at two different ages. Seventy adult dogs, separated from the mother and litter between 30 and 40 days of age, were compared with seventy separate adult dogs, however, at 60 days of age. And ‘it asked the owners to answer a questionnaire with questions regarding the event, by dogs, some potentially problematic behaviors. The data were statistically analyzed to assess whether the separation from the mother age could predispose animals to the event of unwanted behaviors.

The opportunity of expressing destructiveness, excessive barking, afraid to walk the streets, afraid of noises, possessiveness about the game, possessiveness over food and requests for attention was significantly higher for dogs who had been separated from their mothers prematurely. The dogs that came from a store and had been adopted between 30 and 40 days of life manifested in a significantly greater compared to the adopted dogs from a store at 2 months of age some behaviors. No statistically significant differences were detected in dogs from other sources. Young dogs (18-36 months) presenting with greater frequency and destructiveness of chasing its tail behavior. These results showed that, compared with dogs that stay with their mother and siblings up to 60 days, dogs that have been separated from the mother prematurely, potentially problematic behaviors occur more easily, especially if they come from a store.